一种新模式常规采样GOOSE跳闸变压器保护的设计及应用

Design and application of a new model conventional sampling and GOOSE tripping transformer protection

为解决智能变电站复杂数字采样回路环节引起的采样数据异常,提出一种新模式的常规采样GOOSE跳闸变压器保护设计方法。利用NPI插件实现模拟量双AD直接采样的新采样回路并兼容GOOSE信息传输,同时配合基于滑动数据窗的双AD实时采样数据互校验判据,用于监测采样数据的有效性。另外,针对特高压变压器涌流特性,提出了一种分相差流谐波或闭锁、非间断点开放的综合励磁涌流识别判据。仿真结果表明,综合励磁涌流识别判据可以应用于新模式的变压器保护。

To solve sampling-data anomalies of smart substations caused by the complex digital sampling circuit links, this paper puts forward a new model transformer protection design method based on regular sampling and GOOSE trip. NPI plugs is used to achieve new sampling circuit and GOOSE information transmission of analog double AD-directly sampling, and coupled with double AD real-time sampling data validation criterion based on sliding data windows, the effectiveness of sampling data is checked. In addition, for UHV transformer inrush current characteristics, it proposes a comprehensive inrush current identification criterion of differential current harmonics blocking each other and discontinuity points opening, the simulation results show that comprehensive inrush current identification criterion can be applied to the new model transformer protection.